tomorrow on "today" matt will have an exclusive interview with facebook founder mark zuckerberg. this is his first since he took the company public. they discussed fak's future, the morale of the staff and that other big silicon valley company. >> last weekend apple sold about 5 million of their new iphone 5s. did you buy one? >> tim sent one to me. it's a wonderful device. >> you got a freebie. didn't have to pay anything, huh? so are you now an iphone 5 user? is that the phone you've got in your pocket or back in your desk? >> i think i handed my phone to someone else. >> much more of matt's exclusive and rare interview with mark zuckerberg, founder of facebook later on "today." >> we want to begin this half hour with a second chance for a baseball player, a baseball player injured in his one and only at-bat in the major leagues. we'll talk to adam greenberg exclusively but first nbc kerry sanders is at marlins park in miami. hey, kerry, good morning. >> reporter: good morning. what a story. 31-year-old adam greenberg here at home plate in marlins park. it took more than seven